<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="name" placeholder="请输入姓名"/>
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" placeholder="请输入年龄"/>
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="hAdd">添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item,index) in arr" :key="index">
          <td>{{index+1}}</td>
          <td>{{item.name}}</td>
          <td>{{item.age}}</td>
          <td>{{item.gender}}</td>
          <td>
            <button @click="hDel(index)">删除</button>
            <button @click="hEdit(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data(){
    return{
      name:'',
      age:'',
      gender:'男',
      editIndex:'',
      arr: [
        { name: "张三", age: 18, gender: "男" },
        { name: "李四", age: 19, gender: "男" },
        { name: "王五", age: 20, gender: "女" },
        { name: "赵六", age: 26, gender: "男" },
      ],

    }
  },
  methods:{
    hDel(index){
      this.arr.splice(index,1)
    },
    hEdit(index){
     this.name = this.arr[index].name
     this.age = this.arr[index].age
     this.gender = this.arr[index].gender
     this.editIndex = index+1
    },
    hAdd(){
      if(this.name.length === 0 || this.age === '') return alert('请输入内容！')
       if(this.editIndex){
        const obj =  {
            name:this.name,
            age:this.age,
            gender:this.gender
          }
        this.arr.splice([this.editIndex-1],1,obj) 
        this.editIndex = ''
       }else{
          const obj =  {
            name:this.name,
            age:this.age,
            gender:this.gender
          }
          this.arr.push(obj)
       }
        this.name=''
        this.age=''
        this.gender='男'
    }
  }
}
</script>
